本刊第一期报导了松藻矿务局在使用AYJ—1型瓦斯遥测警报仪中发现的不安全隐患问题,使我们联想到 QC—83系列防爆磁力起动器中36V 操作电源一端接地与不接地对井下安全工作的利害关系。目前煤矿井下最广泛使用的防爆磁力起动器中,都附有一个200VA 的 KL 变压器,将操作电压降为36V,供本开关操作及照明使用。面对这一级36V 电源的一端“9”号 The first issue reported the Songzao Mining Bureau in the use of AYJ-1 gas telemetry alarm found in the hidden dangers, so that we think of QC-83 Series Explosion-proof magnetic starter 36V operating power at one end of the ground and not Ground connection to underground safety work. At present, the most widely used explosion-proof magnetic starter in coal mines, are equipped with a 200VA KL transformer, the operating voltage down to 36V, for the operation of the switch and lighting. Facing this level of 36V power supply end “9” number